I made my [F] girlfriend orgasm in front of… [F][M]

Years ago I was dated this girl. I’ll call her Ann (short for anonymous).
Ann had a kid who’s grandma (her child’s dads mom) lived in a different state. A couple time a year she’s come to see her grand child and stay the weekend with us.
So one night, the kid was in bed. Just me, Ann, and grandma in the living room watching TV.
Ann and I were in the couch. She on one end, me on the other. Grandma in a chair across to our right.
Ann was half laying/leaning on the arm. One leg laid flat tucked under her. The other…imagine sitting cross crossed with legs bent at a 90* angle leaning against the arm of the couch. Under a blanket.
Suddenly I got an idea. Ann was pretty adventurous sexually so I thought I see how far I could go.
I moved down to cuddle with her. Got under the blanket. Waited a few minutes to make my move.
I begin rubbing the outside of her leg…slowly moving to the back…around to the inner thigh…and moving down toward my target…the beautiful shaved pussy.
I then look to see her reaction about the time she realized what was I was doing. Eyes WIDE OPEN!!! She can’t react, kids grandma is 10 feet away. She can’t stop me.
I moved her panties to the side. Played with her clit for 5-10 minutes. Her breathing became faster but had to keep control of her self. She began to quietly shiver. Trying to keep quite as she had the first orgasm. (She was always easy to make orgasm)
I gave her a short break. Rubbing her lips for a minute or so, then putting first one finger then two inside her. Pussy dripping wet…Eyes again go wide open. Sweating on her upper lip and forehead. She can’t believe this is happening in front of someone. Especially the grandma.
I the finger her to orgasm, then another and another. Honestly I lost count. 8-10 possible. Like I said. It was easy to do with her.
Finally after about 30 minutes of this, I pull my fingers out, pat her very pleased vagina and slowly move my hand away. She looked at me with both Ecstasy and “I can’t believe you just did that”. We cuddle on the couch for an hour or so. Grandma never suspected a thing.
We finished whatever was on tv and went to bed. Had some of the best sex we’d ever had since dating. That was a damn good night.